Pavement



l sept 1, 1925. 1,552,109

H. w. BOYD PAVEMENT immuik l sept 1, 1925.

i H. w. BOYD rAvmaEN'r Filed Feb. 9. 1925 3 Sheets-5M 2 mmm Patented Sept. 1, 1925.

g1,552,1oe

i sbpncaaonl meg, retrixany migas, animi mno.;

Tora whom tlmcfy'ooncem:

-Be it'- known that I, HAROLDy W.B'0YD,.

certain new and useful llmp`roveme'nts in Pavement,.'of whibh the following-is a speci-tv ication. f

My' invention relates. to improvements iny road making' and: more particularly' t6 street pavingy contiguous to railway' tracksand crossings,l and tliefmethod ofinstelling the generally recognized the vibrations off railway' track structures' under' thec impact. of passing; traffic and the alternatingfperiods of pressure [and ease; gradually' effects a' loosened and "unsettled 'concl-itionr of thetrack `structure*'upon ther road bed. AThis condition' grows' progressively worse until a-v decided verticall' heaving movement of the track strucimiiej results: vThe.resulting con?- ditio'rr is-especially serious in-A'the case ofl railway trank traversing'paved streetsY orl road-'ways,"where" the traclrties are' inaccessible forfrequentvr tampingf and for re ballasting oztvthe'road` bed." `The heaving oil 'the' cross ties disturbs the street paving" Y causing uphezvvail'` Y"of"v the paving material ment atother peints untill 'suchf pavement" K I bro'len for.y otherwise ixdamaged by' track becomes uneven, broken and finally A*diestroyedf. The requ'enttearing 'upoff'streej paving adjacentto' the-V track for'v traiclt"1re-1.'y P' pair pr'lrp'oses re'sultsinI patch vWork 'p-ajvlzifrrgy unsightlyA in appearancejand :frequently in 'Y uneven and otherwiseobjeetioablepav# nient' areas.

To overcome these dilicultiestlrere' is 'con-'KK templated in the present invention" al streetpaving construction forv railway crossingsIVM and track structures, wherein the pavement 1s supported wholly independent oftheV crossr ties and otherftracl; structures, permitting' 'y' a limitedv amount of movement of the trick structure wholly independentot' -the adje#V cent street pavingand withoutsubjecting," the latter to stresses and? strainsl'- Totlrfis* Aend the surface paven'ier1-t' isi'bridfgefl 'over 0 they cross ties and other underground str ci usual, the foundation{tor'r such; surface; paw- Y ing; isi; affordedislelly.; by; spacedl piersilb.-A

cated g intermediate t lsucceeding cross tiesso.

that.. the',weightott the paving@ ispnot ,sus-s tamed-directly byI thev cross: tiesas in the,

the rondzfbedfwfithouttransmittingsuchy vi,-

Vbraitionstoy the overlyingisuriiaace pavement.

-maiyl be: formed.; infren'iovable Vsections or" Y units, '.vvhichg may. beiV reinowedvtof afford-- azc-l cess togthefroadbed foitrebalrlasti'ng' and for ampingfot the ties or ltrack replace usuajlf.street pavingconstructions;y Tor the 'contraryY the; cross ties: and' rail-way track? construction 'mayr vibrate or flee:v permitted a limited amount of heavilgfmovement upon men-tg. which' removablefsectionsori'imits be; replaced inY their' Y original zposit-ion thus'restorlng the street paving to itsL 0ri gi nal condltlon i withV nmmirninn: laborv and eXf A pense `for meterialrgleavingfthe Vsurface pav= mgiinol'as goodrjeondmtron as when, new'.

5 The' objectv 'of theinventiom ist toisimplify the structure las wel-L. as: the means and ymo de of 'operation`t of paving railway 'crossings and surfaces; betweem and co'ntilgfuoiis-'toY railway' tracks; v 'wheeby such paving construc+` tieni-will` noti only-zte eheaipe'ned in construe! 1 tion, buty 'will' be V'more etlicient, oit u greater mdvemennaind unlikely to getfoutiof repairlf Afirma@@Objeetofrthe invention is: t0-

f morlefi of? operation@` or theirv equivalents asv hereinafter fd'eseribed`afnelr- 'set `torthj they n .y Y I l. k itof tlie accomparrying drawings, i

and illustrating the bridging relation of.

the pavement to the cross ties of the track structure. Fig. 5 is atop plan view ofV portion of the railway track showing the' relative location of the foundation piers and cross ties, a portion of the piers being" provided with girders, to receive a plank cover. VFig. 6 is a longitudinal sectional view of a plank crossing or railway track. Fig. 7 is a transverse sectional view of a planked track. Fig. 8 is a perspective view dinarily the surface paving Arests whollyVV of a modification. v 1

Like parts are indicated by similar characters of reference thruout the several views.

It is to be understood that the present invention is not limited to any particular type or style of railway track construction. In the drawings there is illustrated a typical railway crossing in which 1-1-are the track rails at the outer sides of which are located the usual easer rails 2-2 while in spaced relation at the inner sides of the track rails 1 are the usual guard rails 3. In the present construction these special track constructions vcomprising ther crossing members are shownresting upon sleepers 4, transversely arranged 'parallel Vwith thecrossing rail. EX- tending beyond the crossing is the usual railway track construction consisting of the paralleltrack rails 5, restingfupon spaced cross ties 6, which are in. turnembedded in the lusual ballasted road bed 7. Intermediate the sleepers'4 and cross ties 6,- and covering thelatterlbetween the track lrails and at oppositesides thereof is the -usual fill 8. of

gravel or other suitable filling material. 0r-

upon the ties and'such filling material 8. in which the cross ties 6 and vsleepers 4 are embedded, so. that every vibration andI movement ofl the ties j and sleepers areV transmitted Ito the surface paving. In the'present construction while the space beneath the surface paving is substantially filled by the body of filling material 8 and while the surface paving overlies and encloses the fill,

thc surface paving is rentirely supportedV upon foundation piers 9l formedwof concrete. These piers 9 extend somewhat below thev level of the cross ties and. railway track structure and are positioned in spaced relation intermediate Vthe cross ties 6, both intermediate the track rails and outside the track,v rails between the. protruding ends of thev ties. Embedded in the foundation piers v9 are studs 10 forattachment of the surface paving. The pavement shown in Figs-1 to 4 inclusivevconsists of a succession of reinforcedlconcrete,Slabs-'0r umts l1, which rest upon the spaced foundation piers 9 and are interengaged therewith by the stud 10. The pavement slabs 11 are provided with openings 12 to receive the studs. The top orifices of such openings 12 are enlarged or counterbored as at 13 to receiveV nuts 14, screw threaded upon the anchor studs 10. The openings are then filled with tar or some similar material, which while protecting theA nut 14 and affording a uniform surface with that of the slab may vbe readily removed to permit the removal of the nut 14 and the detachment of the paving .slab when necessary. Thepavement slabs 11 maybe made of any desired thickness or composition of material, and the reinforcement rods 15 shown in Fig. 4 may be variously disposed. These features of construction such as the thickness, strength, character of the concrete mixture and the matter of reinforcement of the paving slabs will be necessarily dictatedv by the conditions of use, the Vlocation of the roadway and the character of traffic passing over such pavement. YObviously, also the foundation piers 9 maybe located more or less closely together and the paving slabs 11 may be made of greater or less size. The foundation piers 9 are preferably, though not'necessarily molded in situ. However, if desired, they may be manufactured elsewhere, and transported to the place of use, where they are set in the road bed toan established grade or level, and in predetermined spacedk relation. The railway track structure is then laid in the usual manner intermediate the foundation piers 9. After thev track is constructed and the road-bed properly ballasted, the fill 8 is madeand tamped or rolled to the level of the tops of the cross ties; 6, after which the pavement slabs 11 are bolted in place. Should it be necessaryv ,at any timev to repair the substructure of the traclnror'reballast the road bedA or tamp the ties, the paving slabs 11 are detached from the foundation piers and removed toy afford access to the track structure. Upon completion of such repairs, the slabs are replaced in their original position, resting upon the foundation piers which-insures the return of the pavement to the original grade or level and leaves the surface in its original condition with-no appearance of disturbance or ununiformity and patch work characteristics of the usual track repair job.

Insome locations, such as stations, platforms, in warehouses, and to meet other local conditions, a planked surface'may be desired. In such case, girders16 are laid across the foundation piers 9, and bolted thereto by the anchor studs 10 before described. Surface planks 17 are then nailed Y 16 may be gained to the under surface of the planking 17, as shown in F ig. y(i. In this figure the surface planking 17 are notch ed or recessed on their under surfaces to fit over the transversely arranged girders 16, which in turn rest upon the foundation piers 9.

As an alternative construction there is shown in Fig. 8, metal plates 18, preferably having` their margins slightly upturned at 19 into pan like formation, which rest upon and are secured to the foundation piers 9 and upon which in turn is laid the conventional brick pavement 2O upon a sub-stratum of sand 21, contained in the pan like flanged plate. Vhile this construction does not afford the accessibility for track repair purposes, it serves the other purposes of the invention. Any of the constructions heretofore described will permit a reasonable amount of vibration and heaving movement of the track structure, without disturbing or damaging the surface pavement. As is illustrated in the several figures of the drawing, more particularly Figs. 2 and 4, the surface pavement is elevated and bridged over the sub-structure of the track and supported upon the foundation piers independent of the track structure, in such way that the track structure and pavement are isolated from each other.

F rom the above description it will be apparent that there is thus provided a device of the character described possessing the particular features of advantage before enumerated as desirable, but which obviously is susceptible of modification in its form,

i proportions, detail construction and arrangement of parts without departing from the principle involved or sacrificing any of its advantages.

iVhile in order to comply with the statute the invention has been described in language more or less specific as to structural features, it is to be understood that the invention is not limited to the specific details shown, but that the means and construction herein disclosed comprises the preferred form of several modes of putting the invention into effect and the invention is, therefore, claimed in any of its forms or modifications within the legitimate and valid scope of the appended claims.

Having thus described my invention, I claim: v

1. In a railway track pavement, the combination with a railway track construction,

including spaced rails and cross ties, of al plurality of piers located at spaced intervals intermediate the cross ties, and paving slabs removably secured to the piers and bridging the cross ties whereby the pavement is supported `independent of the track construc-- tion.

due to vibration of the track, consisting in supporting such paving wholly independent of the track construction at spaced intervals and bridging the pavement over the sub-surface track construction thereby permitting vibratory movement of the track construction independent of thepavement. l

4:. The combination with a railway track construction, including track rails and cross ties, of a surface pavement overlying the cross ties and extending adjacent to the track rails and means for supporting the surface pavement independent of the track structure whereby track vibrations will not be transmitted to the surface pavement.

5. The combination with a railway track construction, `including track rails and cross ties, of a surface pavement, comprising a succession of separate independently removable sections, overlying the cross ties and extending adjacent to the track rails, and means for supporting the surface pavement independent of the track structure, whereby track vibrations will not be transmitted to the surface pavement.

6. A railway track construction including track rails and cross ties, paving slabs bridged across the cross ties, and supportedv therebetween, foundation' supports for said y slabs intermediate the crossties, and a body of filling material in which the cross-ties are embedded beneath the paving slabs.`

7. A railway track construction including track rails and cross ties, a plurality of spaced piers located intermediate the crossl ties, and a succession `ofreinforced concrete Vslabs detachably connected with the tops of said piers and bridging the cross ties.

In testimony whereof I have'hereunto set my hand this 24th day of January, A. D. 1925. A v

HAROLD IV. BOYD. 

